Window-sash opener



.I. M. WORKMAN AND F.'W. GRAHAM.

WINDOW SASH OPENER.

APPLICATION FILED APR. 9. I917.

Patented Oct. 26, 1920.

2 SHEETS-SHEET 1.

NU/[Mano M. WORKMAN AND F. W. GRAHAM.

WINDOW-'SASH OPENER.

APPLICATION FILED APR. 9. 1917..

un-bums Patented Oct. 26, 1920.

. 2 SHEETS-SHEET 2.

UITED STATES;

ATENT QFFICE.

JAMES M. wonmuniv AND FREDERICK w. GRAHAM-,- 0F ennnnvrnnn; sourrr- CAROLINA;

wmnow-snsn ornnnn Specification of Letters Patent. Patented fl t 26 1920 Applicationfiled' A'pril 9, 1917. Serial No; 160,646;

To all whom it may "concern I Be it known that we, JAMES Mi WoRKM-A-N and FREDERICK W. -GR-AHAM, citizens of' the United 1 States; and residents of} Greenville, county of Grreenville and State of South Carolina, have invented an Improvementin VVin'dow-Sash' Openers, of which the following is a specification.

The object of our invention is to provide an eiiectivemeans for operating'pivotedor hinged window sashes, more especially for factory buildings and-large public halls or auditoriums the construction being sodesigned as to enable the sash to be positioned to various degrees of opening and held in such positions, but atall times capable by easy manipulation by an attendant to change the angles of or closethe sash.

In general our invention comprehends a pivoted wlndow sash-to WhlClllS hinged an operating bar associated with operatingpivoted sash showing our improvements applied thereto when the sash is held in open position; Fig. 2 is a similar view but with. the operative parts manipulated to permit the sash to be closed; Fig. 3 is avertical sectional view illustrating the window sash 111 closed position; Fig. 4 1s a vertical sectlon corresponding to Fig. 3 but showinga modie fication of ourinvention; Fig. 5 is an eleva-' tion of the specially constructed sheave shown inFig. 4; and Fig. 6 is-a front view of the bracket and attached parts in Fig. 1.

2 is the fixed member of the window sash and 3' indicates the usual hinged or pivoted sash member thereof which-in many casesis of considerable size, constituting approxi mately one-half of the whole'window. i is an operating bar which is hinged to the pivoted sash 8 at 5 and the said hingedend of the bar 4: is laterally curved-as at 6, as indicated in Fig. 3, to enable-'itto bridge over the operative mechanism when the window sash 3"is-closed. Thisbart is provided with a-pluralityof lugs or teeth7, spacedat intervals along its length and also has its lower or free end turned at an angle asindicated at 8-for connection with the end of the operating chain or cable 18", employed in openlng or controlling the closing of the sash. An operating chain orcable 17, for closing the sash; is connected to thebar' 4' adjacent to its hinge point- 5 with the sash 3, sothat when apull uponthe chain or cable'l'? is given, the power is applied to the sash 3 so close to the hinge- 5 of'the bar 4- that the pull in effect is substantially upon the sash. The chains or cables 17 and 18 pass about suitable guide pulleys 16 and depend to within easy reach of an operator and desirably connect in to a loop, as: at 19. It will be understood that if the parts 'are'in' the relation illustratedin Fig.- 3, a pull upon the cable 18 would tend to raise the bar 4c and exert a lateral thrust at the hinge point bar 10 and engageit'in such a manner as to lock the bar aga nst-"a returnmovement.

To provide for the disengagement of the bar 1 1 with the cross bar 10 we employ a lever 12 which is hinged at 13 to the bracket 9, said lever having a short 21111114 projecting hori- Zontally above the grooved wheels 16andunder'the bar-i, and further having a downwardly extending arm carrying a grooved pulley 15 -over which the downwardly extending'portion of the chain 17 passes. It will now be understoodrthat if'the lower part of the chain 17 be pulled, thellever 12 will be-oscillated, as clearlyindicated in Fi 2; and the result of this is, that the arm 14 forces the'bar ei upward within the guard 9 opening the window sash there will be no necessity of any pull upon the chain or cable 17 as the pull upon the cable 18 moves the bar 1 freely over the cross bar 10 to the position desired.

When the sash is fully closed Fig.' 3),

to positively lock the sash against unlawful opening from the outside;

In case of fire, it is desirable that the window sash 3 should automatically close and this action is' provided by having the cross bar 10 connectedin place upon'the bracket 9 by fusible solder which fuses under. the;

increased temperature and upon dropping away, permits bar 4 tomove backward and downward and the window sash 3 to move to a'closed position by gravity. This cross bar 10 may be of any desired shape and the solder joint of any degree of strength to suit the requirements in any particular window construction.

In the modification shown in Fig. 4, the bracket 9 is provided with a specially constructed grooved sheave 16? which has two main grooved I portions 16? and 16, the

former of which is provided with a lateral grooved portion 16 which continues in a further circumferential groove 16 The grooves 16 and 16 are relatively shallower than the grooves. 16 and 16 and operate to provide a cam action upon the chain'or cable 18 by jamming it against the wall19 of the bracket 9 whenever it is desired to lock the bar 45* from areturn movement. The chain 17 for closing the sash is guided in the groove 16 of the sheave 16 whereas the cable 18 for lifting-the bar 1 and opening the sash 3 is guided in' the groove 16 of the sheave. The end 10 of the bracket may be shaped to prevent disengagement of the chains or cables from the sheave. In manipulating the chain 18 to open the sash 3 and hold the bar 4* to maintain the open position of. the sash, the following operation is required The chain 18 is pulled downward and when the sash 3 is'opened to the desired distance, the said chain is pulled laterally over the sheave so that it enters the groove 16 and into the cam groove 16 then upon slightly relieving the pull upon the'chain it will be carried upward and jammed between the abutment 19 and the shallow grooved:

portion 16 of the sheave, thereby retaining the bar :Pandthe sash in their. open positions. To close the sash'the chain'l8 is pulled until itruns back into the groove16",

V of the sash by gravity:

and thereafter it is paid upward and if desired, assisted by a downward pull upon the chain l7 until the parts arrive at the positions indicated in Fig. 4:. As shown in this figure, there is a lug 20 upon the curved portion 6 of the bar 45*, said lug being" in horizontal alinement with lug 21on the bracket 9. The result of this is, that should an'attempt be made to pull'the window sash outward, the lug 20 will engage the lug 21, which will thereby act as a lock to prevent such opening. It is manifest that lugs of this character 20 and 21 may be employed on the constructionsof Fig. 8 equally well, if so desired. 7

While we have described the transverse bar 10'as being secured in place by fusible solder, it is to be understood that we'dol not I p restrict ourselves in that respect, as said bar may be firmly secured to or made integral with the bracket 9. v

It will now be apparent that we havedevised a novel and useful construction which embodies the features of advantage enumer ated as desirable, and whilewe have'in the present instance shown and described the pre ferred embodiment thereof "which has been found in practice to give satisfactory and rellable results, it is to be understood that we do not restrict ourselves to the details,

as the same are susceptible of modification in various particulars wlthout departing fromthe spiritor scope ofthe invention.

Having now described our invention, what V to secure by Letavith a movable window sash therein, and

means for operating the movable sash con slsting of an operatingbarhingedto the movable sash and provided with teeth, a bracket secured to the fixed window frame and hav} ing a detachable cross bar with which the teeth engage to hold the movable sash in'open having oneend. connected with the free end of the operating bar to open the sash and having the other end extending downward from the sheave and. connected to operate the movable window sash and independ' ently operable hand manipulated means for raising the operating bar out of engagement with the cross bar and to permit the closing In testimony of which invention, we hereunto set our hands; 7

JAMES M. WORKMAN.

WVitnesses:

' A. 'S. BEDELL,

J, LK ADAMS.

FREDERICK w. eRAn Q f 

